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Fine-grained image recognition is a challenging computer vision problem, due to the small inter-class variations caused by highly similar subordinate categories, and the large intra-class variations in poses, scales and rotations. In this…

Computer Vision and Pattern Recognition · Computer Science 2016-05-24 Xiu-Shen Wei , Chen-Wei Xie , Jianxin Wu

Micro-gesture recognition (MGR) is challenging due to subtle inter-class variations. Existing methods rely on category-level supervision, which is insufficient for capturing subtle and localized motion differences. Thus, this paper proposes…

Computer Vision and Pattern Recognition · Computer Science 2026-03-18 Jinsheng Wei , Zhaodi Xu , Guanming Lu , Haoyu Chen , Jingjie Yan

Fine-grained visual categorization (FGVC) aims at recognizing objects from similar subordinate categories, which is challenging and practical for human's accurate automatic recognition needs. Most FGVC approaches focus on the attention…

Computer Vision and Pattern Recognition · Computer Science 2022-09-01 Hongbo Sun , Xiangteng He , Yuxin Peng

For the task of image classification, researchers work arduously to develop the next state-of-the-art (SOTA) model, each bench-marking their own performance against that of their predecessors and of their peers. Unfortunately, the metric…

Computer Vision and Pattern Recognition · Computer Science 2021-09-09 Matthew Gwilliam , Adam Teuscher , Connor Anderson , Ryan Farrell

Pose variation and subtle differences in appearance are key challenges to fine-grained classification. While deep networks have markedly improved general recognition, many approaches to fine-grained recognition rely on anchoring networks to…

Computer Vision and Pattern Recognition · Computer Science 2015-11-24 Ning Zhang , Evan Shelhamer , Yang Gao , Trevor Darrell

While semi-supervised learning (SSL) has yielded promising results, the more realistic SSL scenario remains to be explored, in which the unlabeled data exhibits extremely high recognition difficulty, e.g., fine-grained visual classification…

Machine Learning · Computer Science 2023-12-20 Yue Duan , Zhen Zhao , Lei Qi , Luping Zhou , Lei Wang , Yinghuan Shi

We propose a novel approach to enhance the discriminability of Convolutional Neural Networks (CNN). The key idea is to build a tree structure that could progressively learn fine-grained features to distinguish a subset of classes, by…

Computer Vision and Pattern Recognition · Computer Science 2017-09-25 Zhenhua Wang , Xingxing Wang , Gang Wang

We develop techniques for refining representations for fine-grained classification and segmentation tasks in a self-supervised manner. We find that fine-tuning methods based on instance-discriminative contrastive learning are not as…

Computer Vision and Pattern Recognition · Computer Science 2023-09-26 Oindrila Saha , Subhransu Maji

Multi-view subspace clustering (MSC) is a popular unsupervised method by integrating heterogeneous information to reveal the intrinsic clustering structure hidden across views. Usually, MSC methods use graphs (or affinity matrices) fusion…

Machine Learning · Computer Science 2023-08-15 Yidi Wang , Xiaobing Pei , Haoxi Zhan

Fine-grained image analysis (FGIA) is a longstanding and fundamental problem in computer vision and pattern recognition, and underpins a diverse set of real-world applications. The task of FGIA targets analyzing visual objects from…

Computer Vision and Pattern Recognition · Computer Science 2021-11-22 Xiu-Shen Wei , Yi-Zhe Song , Oisin Mac Aodha , Jianxin Wu , Yuxin Peng , Jinhui Tang , Jian Yang , Serge Belongie

Fine-grained visual categorization (FGVC), which aims at classifying objects with small inter-class variances, has been significantly advanced in recent years. However, ultra-fine-grained visual categorization (ultra-FGVC), which targets at…

Computer Vision and Pattern Recognition · Computer Science 2021-10-28 Yajie Sun , Miaohua Zhang , Xiaohan Yu , Yi Liao , Yongsheng Gao

Visual classification can be divided into coarse-grained and fine-grained classification. Coarse-grained classification represents categories with a large degree of dissimilarity, such as the classification of cats and dogs, while…

Computer Vision and Pattern Recognition · Computer Science 2022-02-09 Po-Yung Chou , Cheng-Hung Lin , Wen-Chung Kao

We address the problem of generalized category discovery (GCD) in this paper, i.e. clustering the unlabeled images leveraging the information from a set of seen classes, where the unlabeled images could contain both seen classes and unseen…

Computer Vision and Pattern Recognition · Computer Science 2022-08-04 Yixin Fei , Zhongkai Zhao , Siwei Yang , Bingchen Zhao

Object detection has been widely explored for class-balanced datasets such as COCO. However, real-world scenarios introduce the challenge of long-tailed distributions, where numerous categories contain only a few instances. This inherent…

Computer Vision and Pattern Recognition · Computer Science 2025-12-16 Satyam Gaba

Fine Grained Visual Categorization (FGVC) remains a challenging task in computer vision due to subtle inter class differences and fragile feature representations. Existing methods struggle in fine grained scenarios, especially when labeled…

Computer Vision and Pattern Recognition · Computer Science 2025-06-30 Mingquan Liu

In recent years, convolutional neural networks (CNNs) have achieved impressive performance for various visual recognition scenarios. CNNs trained on large labeled datasets can not only obtain significant performance on most challenging…

Computer Vision and Pattern Recognition · Computer Science 2023-03-29 Xiangyang Li , Luis Herranz , Shuqiang Jiang

Training a fine-grained image recognition model with limited data presents a significant challenge, as the subtle differences between categories may not be easily discernible amidst distracting noise patterns. One commonly employed strategy…

Computer Vision and Pattern Recognition · Computer Science 2024-11-27 Avraham Chapman , Haiming Xu , Lingqiao Liu

With fine-grained classification, we identify unique characteristics to distinguish among classes of the same super-class. We are focusing on species recognition in Insecta, as they are critical for biodiversity monitoring and at the base…

Computer Vision and Pattern Recognition · Computer Science 2024-04-05 Rita Pucci , Vincent J. Kalkman , Dan Stowell

Image classification has been one of the most popular tasks in Deep Learning, seeing an abundance of impressive implementations each year. However, there is a lot of criticism tied to promoting complex architectures that continuously push…

Computer Vision and Pattern Recognition · Computer Science 2024-05-06 Maria Lymperaiou , Konstantinos Thomas , Giorgos Stamou

Plant leaf identification is crucial for biodiversity protection and conservation and has gradually attracted the attention of academia in recent years. Due to the high similarity among different varieties, leaf cultivar recognition is also…

Computer Vision and Pattern Recognition · Computer Science 2023-05-08 Yiyi Zhang , Zhiwen Ying , Ying Zheng , Cuiling Wu , Nannan Li , Jun Wang , Xianzhong Feng , Xiaogang Xu
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